外文翻译--无线超混沌通信系统安全的实时图像传输的设计和fpga实现(编辑修改稿)

外文翻译--无线超混沌通信系统安全的实时图像传输的设计和fpga实现(编辑修改稿)内容摘要：

system is used to date to the best of our knowledge. Therefore, there are still plentiful issues to be resolved before chaosbased systems can be put into practical use. To overe these drawbacks, we propose in this paper a digital feedback hyperchaotic synchronization and suggest the use of advanced wireless munication technologies, characterized by high noise immunity, to exploit digital hyperchaotic modulation advantages for robust secure data transmissions. In this context, as results of the rapid growth of munication technologies, in terms of reliability and resistance to channel noise, an interesting munication protocol for wireless personal area works (WPANs, ., ZigBee or ZigBee Pro LowRateWPAN protocols) and wireless local area work (WLAN, ., WiFi protocol WLAN) is developed. These protocols are identified by the IEEE and IEEE standards and known under the name ZigBee and WiFi munication protocols, respectively. These protocols are designed to municate data through hostile Radio Frequency (RF) environments and to provide an easytouse wireless data solution characterized by secure, lowpower, and reliable wireless work architectures. These properties are very attractive for resolving the problems of chaotic munications especially the high noise immunity property. Hence, our idea is to associate chaotic munication with theWLAN or WPAN munication protocols. However, this association needs a numerical generation of the chaotic behavior since the XBee protocol is based on digital the hardware area, advanced modern digital signal processing devices, such as field programmable gate array (FPGA), have been widely used to generate numerically the chaotic dynamics or the encryption keys. The advantage of these techniques is that the parameter mismatch problem does not exist contrary to the analog techniques. In addition, they offer a large possible integration of chaotic systems in the most recent digital munication technologies such as the ZigBee munication protocol. In this paper, a wireless hyperchaotic munication system based on dynamic feedback modulation and RF XBee protocols is investigated and realized experimentally. The transmitter and the receiver are implemented separately on two Xilinx VirtexII Pro circuits and connected with the XBee RF module based on the WiFi or ZigBee protocols. To ensure and maintain this connection, we have developed a VHSIC (very high speed integrated circuit) hardware description language (VHDL)based hardware architecture to adapt the implemented hyperchaotic generators, at the transmitter and receiver, to the XBee munication protocol. Note that the XBee modules interface to a host device through a logiclevel asynchronous serial port. Through its serial port, the module can municate with any logic and voltagepatible Universal Asynchronous Receiver/Transmitter (UART). The used hyperchaotic generator is the wellknown and the most investigated hyperchaotic Lorenz system. This hyperchaotic key generator is implemented on FPGA technology using an extension of the technique developed in for threedimensional (3D) chaotic systems. This technique is optimal since it uses directly VHDL description of a numerical resolution method of continuous chaotic system models. A number of transmission tests are carried out for different distances between the transmitter and receiver. The realtime results obtained validate the proposed hardware architecture. Furthermore, it demonstrates the efficiency of the proposed solution consisting on the association of wireless protocols to hyperchaotic modulation in order to build a reliable digital encrypted data or image hyperchaotic munication system. Hyperchaotic synchronization and encryption technique Contrary to a triggerbased slave/receiver chaotic synchronization by the transmitted chaotic masking signal, which limits the performance of the rate synchronization transmission, we pr。